roller drier,rotary drying machine Roller Drum drying machine 1.High efficiency 2.good performance. 3. easy operation,l Roller Drying machine, rotating drying machine, , Introduction:Roller Drying machine Drum dryer, also known as rotary drum drier, is the material heating and drying device. Widely used in cement, mining, building materials, chemical industry, drying coal, limestone, grain, sand, ...